The pilot reported that, while spotting deer, the helicopter hit the top of a tree damaging the tail rotor. The helicopter began to spin, and the pilot closed the throttle. The helicopter landed and rolled onto its left side.

The helicopter sustained substantial damage to the tail boom and fuselage.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

The pilot's recommendation was to fly at a higher and safer altitude.